Although Minecraft's Java and Bedrock Editions are quite different, it's still possible to convert an existing Java world to Bedrock if you don't mind there being some differences to the world ...

If you want to convert Minecraft Bedrock world to Java and enjoy the host of mods, shaders, and texture packs, you're in luck.

Minecraft Bedrock Update 1.19.40 adds a lot of fixes and features, including parity updates and certain features available on the Java edition.